Patents by Inventor Ralph Oliver Ranck

Ralph Oliver Ranck has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyester film coated with an inorganic coating and with a vinylidene chloride copolymer containing a linear polyester resin
    Patent number: 3975573
    Abstract: A polyester film having an inorganic coating and an overcoating which contains1. a vinylidene chloride copolymer, and2. a minor amount of a linear polyester resin prepared by condensing a glycol and a polyfunctional acid, at least 70% of the polyfunctional acid being an aromatic acid. The overcoating adheres to the inorganic coating as well the side of the polyester film not having the inorganic coating.
    Type: Grant
    Filed: January 13, 1975
    Date of Patent: August 17, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ralph Oliver Ranck
  • Polyester film coated with a vinylidene chloride copolymer containing a linear polyester resin
    Patent number: 3958065
    Abstract: A polyester film having a coating which contains1. a vinylidene chloride copolymer, and2. a minor amount of a linear polyester resin prepared by condensing a glycol and a polyfunctional acid, at least 70% of the polyfunctional acid being an aromatic acid. The linear polyester resin improves adhesion of the coating to the film.
    Type: Grant
    Filed: January 13, 1975
    Date of Patent: May 18, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ralph Oliver Ranck